CN206272217U - A kind of height voltage protection circuit - Google Patents
A kind of height voltage protection circuit Download PDFInfo
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- CN206272217U CN206272217U CN201621144260.7U CN201621144260U CN206272217U CN 206272217 U CN206272217 U CN 206272217U CN 201621144260 U CN201621144260 U CN 201621144260U CN 206272217 U CN206272217 U CN 206272217U
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Abstract
A kind of high-low voltage protection circuit, including, the multiple high-low pressures protection control circuit for being used to control the power supply to power the supply voltage source is connected between power supply and supply voltage source in parallel, each described high-low pressure protection control circuit includes, high-low pressure comparison circuit and on-off circuit, the on-off circuit is connected between the high-low pressure comparison circuit and supply voltage source, when the high-low pressure comparison circuit exports the first level signal, the on-off circuit turns on the connection of the power supply and the supply voltage source, when the high-low pressure comparison circuit exports second electrical level signal, the on-off circuit disconnects the connection of the power supply and the supply voltage source.The utility model protects control circuit by setting multiple and being connected to the high-low pressure between power supply and supply voltage source; each high-low pressure protection control circuit is correspondingly provided with a threshold range for supply voltage, only allows power supply to be powered to supply voltage source in the threshold range of the supply voltage.
Description
Technical field
The utility model is related to protection of circuit field, more particularly to a kind of height voltage protection circuit.
Background technology
Existing automobile storage battery system is divided into two kinds of electric power systems of 12V and 24V, because onboard system is supplied by battery
Electricity, therefore vehicle mounted electrical apparatus need to be operated in the normal state of charge of battery, when accumulator electric-quantity is less than protection point or higher than guarantor
After shield point, vehicle mounted electrical apparatus should all possess the function of self cut-out electricity consumption, reach protection battery and occur without overdischarge and protection
The safe purpose of this equipment.
Vehicle mounted electrical apparatus understand the automotive battery system according to residing for design the height voltage protection circuit of electrical equipment, main at present logical
Two methods are crossed to realize.Mode one is that height voltage protection circuit is concatenated between battery and appliances power source circuit, but at present,
This method can only be according to the protection point voltage that power supply is set in the case of a kind of supply voltage, when the electrical equipment of 12V uses 24V systems
The protection point of protection circuit must be remodified, 24V electrical equipment uses the protection point that 12V systems also must be newly set circuit.This
Kind mode flexibility ratio is not high, and vehicle mounted electrical apparatus can not be matched in various vehicles well.Mode two be by MCU (single-chip microcomputer) from
Band ADC (A/D converter) sampling or external ADC sampler, real-time sampling input supply voltage, according to default power supply electricity
Current supply circuit is opened in pressure value control cut-out.This mode needs MCU to be constantly in working condition, even if also being needed after cutoff circuit
Want ADC to sample always, electric appliance is opened after recovering so as to voltage, cause the stand-by power consumption overrate of electrical equipment, and MCU
Understand the electricity of battery consumption always.Simultaneously as the hysteresis quality of software detection, this way there is also one in terms of reliability
Determine risk.
Utility model content
In view of above-mentioned condition, the utility model offer circuit design is simple, power-supply system suitable for multiple voltage height
Low-voltage protection circuit.
A kind of high-low voltage protection circuit that the utility model is provided, including, it is connected in power supply and supply voltage source in parallel
Between for controlling multiple high-low pressures protection control circuit that the power supply powers to the supply voltage source, each described height
Pressure protection control circuit includes：
High-low pressure comparison circuit, receives the partial pressure of the power supply and is compared with reference voltage, when the electricity of the power supply
It is pressed in when in threshold range, the high-low pressure comparison circuit exports the first level signal, when the voltage of the power supply is not in threshold value
In the range of when, the high-low pressure comparison circuit exports second electrical level signal；
On-off circuit, is connected between the output end of the high-low pressure comparison circuit and the supply voltage source, when described
When the output end of high-low pressure comparison circuit exports first level signal, the on-off circuit turns on the power supply and the confession
The connection in piezoelectric voltage source, when the output end of the high-low pressure comparison circuit exports second electrical level signal, the on-off circuit breaks
The connection of the power supply and the supply voltage source is opened, each described high-low pressure protection controls the corresponding threshold range of circuit
It is different.
Above-mentioned high-low voltage protection circuit, wherein, the high-low pressure comparison circuit includes the first comparator being connected in parallel
With the second comparator, the input in the same direction and reverse input end of the first comparator receive the reference voltage and first respectively
Power supply partial pressure, the input in the same direction and reverse input end of second comparator receive second source partial pressure and the benchmark respectively
The output end of voltage, the first comparator and second comparator connects with the output end of the high-low pressure comparison circuit
Connect, when the voltage of the power supply is in the threshold range, the first power supply partial pressure is less than the reference voltage, while institute
Second source partial pressure is stated more than the reference voltage, the high-low pressure comparison circuit exports the first level signal, when the power supply
Voltage when exceeding the threshold range, the high-low pressure comparison circuit exports second electrical level signal.
Above-mentioned high-low voltage protection circuit, wherein, the high-low pressure protection control circuit sets two, high-low pressure protection control
Circuit high-low pressure processed protection control the high-low pressure of circuit first to protect high-low pressure to protect to control the corresponding threshold range of circuit to be
11V~16V, it is 22V~32V that the protection high-low pressure protection of the second high-low pressure controls the corresponding threshold range of circuit.
Above-mentioned high-low voltage protection circuit, wherein, the on-off circuit includes triode and metal-oxide-semiconductor, the triode
Base electrode is connected with the output end of the first comparator and the second comparator, the colelctor electrode of the triode and the metal-oxide-semiconductor
Grid connection, the source electrode of the metal-oxide-semiconductor is connected with the power supply, and the drain electrode of the metal-oxide-semiconductor is connected with the supply voltage source.
Above-mentioned high-low voltage protection circuit, wherein, each described high-low pressure protection control circuit also includes：
First bleeder circuit, first bleeder circuit by least one first divider resistances be connected to the power supply with
Between the first comparator, to produce the first power supply partial pressure；
Second bleeder circuit, second bleeder circuit by least one second divider resistances be connected to the power supply with
Between second comparator, to produce the second source partial pressure.
Above-mentioned high-low voltage protection circuit, wherein, first divider resistance according to the higher limit of the threshold range and
The reference voltage is set；Second divider resistance is set according to the lower limit of the threshold range and the reference voltage.
Above-mentioned high-low voltage protection circuit, wherein, the height voltage protection circuit also includes reference voltage generating circuit, institute
Stating reference voltage generating circuit includes the resistance and voltage-stablizer of the connection power supply, to produce the reference voltage.
Above-mentioned high-low voltage protection circuit, wherein, the high-low pressure protection control circuit is also included for being described first
Comparator and second comparator provide the system power supply generation circuit of voltage, and the system power supply generation circuit includes and electricity
Two resistance and the voltage-stabiliser tube with described two resistant series of source connection.
Above-mentioned high-low voltage protection circuit, wherein, second comparator is hysteresis comparator.
The utility model protects control electricity by setting multiple and being connected to the high-low pressure between power supply and supply voltage source
Road, each high-low pressure protection control circuit controls to disconnect and lead by setting a high-low pressure comparison circuit and an on-off circuit
The logical connection with power supply, each high-low pressure protection control circuit is correspondingly provided with a threshold range for supply voltage, only
Power supply is allowed to be powered to supply voltage source in the threshold range of the supply voltage.
Brief description of the drawings
The structural representation of the height voltage protection circuit that Fig. 1 is provided for the utility model first embodiment；
Fig. 2 is the structural representation of high-low pressure protection control circuit in Fig. 1；
The structural representation of the height voltage protection circuit that Fig. 3 is provided for the utility model second embodiment；
Fig. 4 is the circuit diagram of the first high-low pressure protection control circuit in Fig. 3；
Fig. 5 is the circuit diagram of the first bleeder circuit in Fig. 4；
Fig. 6 is the circuit diagram of the second bleeder circuit in Fig. 4；
Fig. 7 is the circuit diagram of reference voltage generating circuit in the utility model second embodiment；
Fig. 8 is the circuit diagram of system power supply generation circuit in the utility model second embodiment.
Specific embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein ad initio
Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng
The embodiment for examining Description of Drawings is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model
Limitation.
It should be noted that when element is referred to as " being fixedly arranged on " another element, it can directly on another element
Or can also there is element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or may be simultaneously present centering elements.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with technology of the present utility model is belonged to
The implication that the technical staff in domain is generally understood that is identical.It is herein to be in term used in the description of the present utility model
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein " and/or " include
The arbitrary and all of combination of one or more related Listed Items.
A kind of height voltage protection circuit that Fig. 1 is provided for the utility model first embodiment is referred to, as illustrated, the height
Low-voltage protection circuit includes being connected in parallel to be used to control 10 pairs of power supply electricity of the power supply between power supply 10 and supply voltage source 30
Multiple high-low pressures protection control circuit 20 of the power supply of potential source 30, the supply voltage source 30 is the electrical equipment being connected with power supply 10.
As shown in Fig. 2 each high-low pressure protection control circuit 20 includes high-low pressure comparison circuit 21 and is connected to the high-low pressure ratio
Compared with the on-off circuit 22 between circuit 21 and the supply voltage source 30.
The high-low pressure comparison circuit 21 includes the comparator 212 of first comparator 211 and second being connected in parallel.Described
One comparator 211 is used to comparing the first power supply partial pressure UH and reference voltage Ui, the input in the same direction of first comparator 211 and reversely
Input receives reference voltage Ui and the first power supply partial pressure UH respectively.When the first power supply partial pressure UH is more than the reference voltage
During Ui, the output low level of the first comparator 211, when the first power supply partial pressure UH is less than the reference voltage Ui, institute
State the output high level of first comparator 211.Second comparator 212 is used to compare second source partial pressure UL and reference voltage
Ui, the input in the same direction and reverse input end of second comparator 212 receive second source partial pressure UL and reference voltage Ui respectively.
When the second source partial pressure UL is less than the reference voltage Ui, second comparator 212 exports low level, when the second electricity
When source partial pressure UL is more than reference voltage Ui, the output high level of the second comparator 212.When the comparator of first comparator 211 and second
In 212 during at least one output low level, the high-low pressure comparison circuit 21 exports low level, i.e. second electrical level signal；When
When the comparator 212 of first comparator 211 and second all exports high level, the high-low pressure comparison circuit exports high level, i.e., and the
One level signal.
The signal that on-off circuit 22 is exported according to high-low pressure comparison circuit 21 controls the high-low pressure protection control circuit 20
With the connection of the supply voltage source 30：
When the voltage of power supply 10 is in threshold range, the first power supply partial pressure UH is less than reference voltage Ui, while described the
When two power supply partial pressure UL are more than the reference voltage Ui, high-low pressure comparison circuit 21 exports the first level signal, now switchs electricity
Road 22 turns on the connection with the supply voltage source 30；When the voltage of power supply 10 exceeds threshold range, first power supply point
Pressure UH is less than the reference voltage Ui, the high-low pressure comparison circuit 21 more than the reference voltage Ui or second source partial pressure UL
Output second electrical level signal, the on-off circuit 22 disconnects the connection with the supply voltage source 30.
It is electric when having a conducting and the connection of supply voltage source 30 when in the multiple high-low pressure protection control circuit 20
Source 10 turns on the power supply to supply voltage source 30.The number of high-low pressure protection control circuit 20 can be used for supply voltage source 30
Electrical voltage system species set.
The present embodiment protects control circuit by setting multiple and being connected to the high-low pressure between power supply and supply voltage source,
Each control is controlled to disconnect and turned on by a high-low pressure comparison circuit and an on-off circuit, the protection control of each high-low pressure
Circuit is all correspondingly provided with a threshold range for supply voltage, only allows power supply in the threshold range of the supply voltage to power supply
Voltage source is powered.
Fig. 3 to Fig. 8 is referred to, is a kind of height voltage protection circuit that the utility model second embodiment is provided, this implementation
Example is illustrated with two high-low pressure protection control circuits, and the protection of the first high-low pressure controls circuit 20a and the protection of the second high-low pressure
Control circuit 20b, is protected, for example, 12V electrical voltage systems and 24V electrical voltage systems for two kinds of different electrical voltage systems respectively.
It is 16V and 11V that the high voltage protective point voltage and low-voltage protection point voltage of 12V electrical voltage systems are divided into, i.e. the first high-low pressure protection control
The threshold range of the corresponding supply voltage of circuit processed is 11V~16V.The high voltage protective point voltage and low pressure of 24V electrical voltage systems are protected
Shield point voltage is respectively 32V and 22V, i.e. it is 22V that the second high-low pressure protection controls the threshold range of the corresponding supply voltage of circuit
~32V.
As shown in figure 4, illustrating high-low pressure protection control of the present utility model by taking the first high-low pressure protection control circuit as an example
The structure of circuit, first high-low pressure protection control circuit includes high-low pressure comparison circuit and to be connected to the high-low pressure more electric
On-off circuit between road and the supply voltage source.
The high-low pressure comparison circuit includes the comparator 212 of first comparator 211 and second being connected in parallel.Described first
Comparator 211 is used to compare the first power supply partial pressure UH and reference voltage Ui, and the input in the same direction of first comparator 211 is defeated with reverse
Enter end and receive reference voltage Ui and the first power supply partial pressure UH respectively.When the first power supply partial pressure UH is more than the reference voltage Ui
When, the output low level of the first comparator 211 is described when the first power supply partial pressure UH is less than the reference voltage Ui
First comparator 211 exports high level.Second comparator 212 is used to compare second source partial pressure UL and reference voltage Ui,
The input in the same direction and reverse input end of second comparator 212 receive second source partial pressure UL and reference voltage Ui respectively.When
When the second source partial pressure UL is less than the reference voltage Ui, second comparator 212 exports low level, works as second source
When partial pressure UL is more than reference voltage Ui, the output high level of the second comparator 212.When the comparator 212 of first comparator 211 and second
In at least one output low level when, high-low pressure comparison circuit output low level, i.e. second electrical level signal；Work as first comparator
211 and second comparator 212 when all exporting high level, high-low pressure comparison circuit output high level, i.e. the first level signal.
On-off circuit includes triode QD1 and metal-oxide-semiconductor QD2, the base electrode of triode QD1 and the first comparator 211
Output end with the second comparator 212 is connected, and the colelctor electrode of triode QD1 is connected with the grid of the metal-oxide-semiconductor QD2, metal-oxide-semiconductor
The source electrode of QD2 is connected with power supply, the drain electrode of metal-oxide-semiconductor QD2 and the connection of supply voltage source.When high-low pressure comparison circuit exports second
During level signal, triode QD1 cut-offs, metal-oxide-semiconductor QD2 disconnects the connection with supply voltage source, i.e. first high-low pressure protection control
Circuit processed disconnects the connection with supply voltage source.When the first high-low pressure comparison circuit exports second electrical level signal, triode QD1
Conducting, metal-oxide-semiconductor QD2 conductings and the connection of supply voltage source, i.e. first high-low pressure protection control circuit turn-on and supply voltage
The connection in source.
In the present embodiment, first high-low pressure protection control circuit also includes first for producing the first power supply partial pressure UH
Bleeder circuit, the second bleeder circuit for producing second source partial pressure UL and for producing the reference voltage of reference voltage Ui to produce
Raw circuit.
First bleeder circuit passes through at least one the first divider resistance being connected between power supply and first comparator 211,
To produce a partial pressure of power supply, i.e. the first power supply partial pressure UH.First power supply partial pressure UH enters the reverse of first comparator 211
Input is compared with the reference voltage Ui of input in the same direction.First divider resistance is upper according to the threshold range of supply voltage
Limit value and the reference voltage are set
As shown in figure 5, in the first high-low pressure protection control circuit, first bleeder circuit is provided with divider resistance
RD56, divider resistance RD61 and divider resistance RD62.The height of the input voltage VCC_IN of power supply can be reflected by divider resistance
Onto the first power supply partial pressure UH, specific formula is as follows：
From above formula, UH is linear with input voltage VCC_IN, can realize working as VCC_ by divider resistance
When IN is high voltage protective point voltage 16V, the first power supply partial pressure UH is equal to reference voltage Ui.When VCC_IN is more than high voltage protective point electricity
During pressure 16V, the first power supply partial pressure UH can be more than reference voltage Ui, and now the reverse input end voltage ratio of first comparator 211 is same
It is high to input terminal voltage, first comparator output low level.When VCC_IN is less than this high voltage protective point voltage 16V, UH is small
In reference voltage Ui, now the reverse input end voltage ratio input terminal voltage in the same direction of first comparator 211 is low, first comparator
211 output high level.So as to the voltage change of input is converted into logic output.
As shown in fig. 6, second bleeder circuit and the basic phase of the first bleeder circuit of first high-low pressure protection control circuit
Together, be also a partial pressure that power supply is produced by three second divider resistances RD68, RD74, RD75, i.e. second source partial pressure
UL.The second source partial pressure enters the reverse input end of the second comparator 212, and the reference voltage Ui with input in the same direction is compared
Compared with.Second divider resistance is set according to the lower limit of the threshold range and the reference voltage.Similarly, the input voltage of power supply
The height of VCC_IN can reflect on second source partial pressure UL that specific formula is as follows：
From above formula, UL is linear with input voltage VCC_IN, can realize working as VCC_ by divider resistance
When IN is equal to low-voltage protection point voltage 11V, second source partial pressure UL is equal to reference voltage Ui.When VCC_IN is more than low-voltage protection point
During voltage 11V, second source partial pressure UL can be more than reference voltage Ui, now the input terminal voltage ratio in the same direction of the second comparator 212
Reverse input end voltage is high, the output high level of the second comparator 212.When VCC_IN is less than low-voltage protection point voltage 11V, UL meetings
Less than reference voltage Ui, now the input terminal voltage in the same direction of the second comparator 212 is lower than reverse input end voltage, the second comparator
212 output low levels.So as to the voltage change of input is converted into logic output.
In addition, the second comparator 212 is hysteresis comparator in the present embodiment, resistance RD66 is defeated from the second comparator 212
Go out end and be connected to input in the same direction, during VCC_IN is from high level toward low level power down, second source partial pressure UL occur low
When reference voltage Ui, the output of the second comparator 212 is changed into low level, then be made up of resistance RD66 and RD68, RD72
Potential-divider network, the ratio that the terminal voltage in the same direction of the second comparator 212 can be drawn is low by the partial pressure value that above formula is calculated.So as to only
The amplitude that VCC_IN is improved reaches to a certain degree, can just make UL more than reference data Ui, it is achieved thereby that sluggish comparing function, keeps away
Repeatedly concussion of the comparator near protection point is exempted from.
The circuit structure of second high-low pressure protection control circuit is basic with the structure of the first high-low pressure protection control circuit
Identical, difference is that second high-low pressure protection controls the partial pressure of the first bleeder circuit and the second bleeder circuit in circuit
The resistance of resistance is different, and second high-low pressure protection controls the divider resistance of circuit according to the protection point voltage of 24V electrical voltage systems
Set.When supply voltage is equal to the high voltage protective point voltage 32V of the 24V electrical voltage systems, second high-low pressure protection control electricity
The first power supply partial pressure on road is equal to reference voltage；When supply voltage is equal to the low-voltage protection point voltage 22V of the 24V electrical voltage systems
When, the second source partial pressure of second high-low pressure protection control circuit is equal to reference voltage.When supply voltage is higher than 32V or is less than
During 22V, the second high-low pressure protection control circuit disconnects the connection with supply voltage source, only when supply voltage is in threshold range
The second high-low pressure protection control circuit is turned on supply voltage source in 22V~32V.
Because the protection of the first high-low pressure controls circuit to control circuit to be connected side by side with the protection of the second high-low pressure, and 12V electricity
The threshold range of the supply voltage of pressure system is non-overlapping with the threshold range of the supply voltage of 24V electrical voltage systems, when the first height
When pressure protection control circuit and the protection of the second high-low pressure control a conducting in circuit, realize power supply to institute's supply voltage source
Power supply.
Reference voltage is the canonical reference source of comparator, it is therefore desirable to which high-precision voltage-stablizer is provided accurately for comparator
Datum.As shown in fig. 7, the present embodiment constitutes benchmark by the high-precision voltage stabilizing device UD7 and resistance RD55 that are connected with power supply
Voltage generation circuit produces the reference voltage.The reference voltage of each high-low pressure protection control circuit is equal.
As shown in figure 8, the voltage supplied of each comparator produces circuit to provide by system power supply, the system power supply is produced
Circuit includes two resistance RD70, RD71 and the voltage-stabiliser tube DD1 connected with described two resistance RD70, RD71.The power supply is produced
The input of raw circuit is connected with power supply, and output end is connected with the comparator 212 of first comparator 211 and second.
The present embodiment, control circuit is protected by setting two high-low pressures, is respectively used to two kinds of protections of electrical voltage system, nothing
By supply voltage source connect be which kind of voltage power supply, when supply voltage exceed the power supply supply voltage threshold range
When, power supply disconnects the connection with supply voltage source, realizes the protection to power supply and supply voltage source.For low-voltage variation, use
Hysteresis comparator, can prevent protection circuit from saltus step occur in low-voltage protection point, while can be opened after voltage recovery powering back
Road
While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that：
In the case where principle of the present utility model and objective is not departed from various changes, modification, replacement can be carried out to these embodiments
And modification, scope of the present utility model limits by claim and its equivalent.
Claims (9)
1. a kind of high-low voltage protection circuit, it is characterised in that including being connected in parallel between power supply and supply voltage source is used for
Control multiple high-low pressures protection control circuit that the power supply is powered to the supply voltage source, each described high-low pressure protection control
Circuit processed includes：
High-low pressure comparison circuit, receives the partial pressure of the power supply and is compared with reference voltage, when the voltage of the power supply exists
When in threshold range, the high-low pressure comparison circuit exports the first level signal, when the voltage of the power supply is not in threshold range
When interior, the high-low pressure comparison circuit exports second electrical level signal；
On-off circuit, is connected between the output end of the high-low pressure comparison circuit and the supply voltage source, when the height
When pressing the output end of comparison circuit to export first level signal, the on-off circuit turns on the power supply with the power supply electricity
The connection of potential source, when the output end of the high-low pressure comparison circuit exports second electrical level signal, the on-off circuit disconnects institute
The connection of power supply and the supply voltage source is stated, each described high-low pressure protection controls the corresponding threshold range of circuit not
Together.
2. high-low voltage protection circuit as claimed in claim 1, it is characterised in that the high-low pressure comparison circuit includes parallel connection
The first comparator of connection and the second comparator, the input in the same direction and reverse input end of the first comparator receive institute respectively
Reference voltage and the first power supply partial pressure are stated, the input in the same direction and reverse input end of second comparator receive the second electricity respectively
The output end of source partial pressure and the reference voltage, the first comparator and second comparator compares with the high-low pressure
The output end connection of circuit, when the voltage of the power supply is in the threshold range, the first power supply partial pressure is less than described
Reference voltage, while the second source partial pressure is more than the reference voltage, the high-low pressure comparison circuit exports the first level
Signal, when the voltage of the power supply exceeds the threshold range, the high-low pressure comparison circuit exports second electrical level signal.
3. high-low voltage protection circuit as claimed in claim 1, it is characterised in that the high-low pressure protection control circuit is set
Two, the protection of the first high-low pressure controls the corresponding threshold range of circuit for 11V~16V, the second high-low pressure protection control electricity
The corresponding threshold range in road is 22V~32V.
4. high-low voltage protection circuit as claimed in claim 2, it is characterised in that the on-off circuit include triode and
Metal-oxide-semiconductor, the base electrode of the triode is connected with the output end of the first comparator and the second comparator, the triode
Colelctor electrode is connected with the grid of the metal-oxide-semiconductor, and the source electrode of the metal-oxide-semiconductor is connected with the power supply, the drain electrode of the metal-oxide-semiconductor and institute
State supply voltage source connection.
5. high-low voltage protection circuit as claimed in claim 2, it is characterised in that each described high-low pressure protection control circuit
Also include：
First bleeder circuit, first bleeder circuit by least one first divider resistances be connected to the power supply with it is described
Between first comparator, to produce the first power supply partial pressure；
Second bleeder circuit, second bleeder circuit by least one second divider resistances be connected to the power supply with it is described
Between second comparator, to produce the second source partial pressure.
6. high-low voltage protection circuit as claimed in claim 5, it is characterised in that first divider resistance is according to the threshold
The higher limit and the reference voltage for being worth scope are set；Lower limit and institute of second divider resistance according to the threshold range
State reference voltage setting.
7. high-low voltage protection circuit as claimed in claim 1, it is characterised in that the height voltage protection circuit also includes base
Quasi- voltage generation circuit, the reference voltage generating circuit includes the resistance and voltage-stablizer of the connection power supply, described to produce
Reference voltage.
8. high-low voltage protection circuit as claimed in claim 2, it is characterised in that the high-low pressure protection control circuit is also wrapped
Include the system power supply for providing voltage for the first comparator and second comparator and produce circuit, the system power supply
Producing circuit includes two resistance being connected with power supply and the voltage-stabiliser tube with described two resistant series.
9. high-low voltage protection circuit as claimed in claim 2, it is characterised in that second comparator compares for sluggishness
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621144260.7U CN206272217U (en) | 2016-10-20 | 2016-10-20 | A kind of height voltage protection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621144260.7U CN206272217U (en) | 2016-10-20 | 2016-10-20 | A kind of height voltage protection circuit |
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| CN206272217U true CN206272217U (en) | 2017-06-20 |
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| CN201621144260.7U Active CN206272217U (en) | 2016-10-20 | 2016-10-20 | A kind of height voltage protection circuit |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294057A (en) * | 2017-08-16 | 2017-10-24 | 苏州易美新思新能源科技有限公司 | Protection device and method, electric power system |
| CN108362843A (en) * | 2018-02-07 | 2018-08-03 | 厦门海荭兴仪器股份有限公司 | A kind of portable pesticide residue detection device |
| CN108429239A (en) * | 2018-04-24 | 2018-08-21 | 广州金升阳科技有限公司 | A kind of output overvoltage protection circuit and the power supply comprising the circuit |
| CN110207341A (en) * | 2019-01-16 | 2019-09-06 | 广东美的制冷设备有限公司 | Drive control circuit and air conditioner |
| CN113131908A (en) * | 2021-04-16 | 2021-07-16 | 希姆通信息技术（上海）有限公司 | Circuit for controlling power switch by hardware and software interface |
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2016
- 2016-10-20 CN CN201621144260.7U patent/CN206272217U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107294057A (en) * | 2017-08-16 | 2017-10-24 | 苏州易美新思新能源科技有限公司 | Protection device and method, electric power system |
| CN108362843A (en) * | 2018-02-07 | 2018-08-03 | 厦门海荭兴仪器股份有限公司 | A kind of portable pesticide residue detection device |
| CN108429239A (en) * | 2018-04-24 | 2018-08-21 | 广州金升阳科技有限公司 | A kind of output overvoltage protection circuit and the power supply comprising the circuit |
| CN110207341A (en) * | 2019-01-16 | 2019-09-06 | 广东美的制冷设备有限公司 | Drive control circuit and air conditioner |
| CN110207341B (en) * | 2019-01-16 | 2024-04-19 | 广东美的制冷设备有限公司 | Drive control circuit and air conditioner |
| CN113131908A (en) * | 2021-04-16 | 2021-07-16 | 希姆通信息技术（上海）有限公司 | Circuit for controlling power switch by hardware and software interface |
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